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EP 4 021 871 A1

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(43) Date of publication: 06.07.2022 Bulletin 2022/27 (21) Application number: 20858549.7 (22) Date of filing: 30.06.2020

(51) International Patent Classification (IPC):  C05G 1/00(2006.01) C05C 9/00(2006.01) C05G 5/00(2020.01) C05D 5/00(2006.01) (52) Cooperative Patent Classification (CPC): C05C 9/00; C05C 9/005   C-Sets: C05C 9/00, C05D 5/00, C05D 9/02; (86) International application number: PCT/CN2020/099469 (87) International publication number: WO 2021/036494 (04.03.2021 Gazette 2021/09)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 28.08.2019 DE 102019006059 (71) Applicants: K+S Aktiengesellschaft 34131 Kassel (DE) ShenZen K + S Trading Co., Ltd. Guangdong 518408 (CN)

(72) Inventors: BAUCKE, Guido 36277 Schenklengsfeld (DE) DENG, LieYing Shenzhen, Guangdong 518034 (CN) DIETRICH, Armin 37299 Weissenborn (DE) DRESSEL, Stefan 34128 Kassel (DE) FU, Chuanfeng Shenzhen, Guangdong 518013 (CN) GUO, Yanliang Shenzhen, Guangdong 518000 (CN) SCHERR, David 36088 Huenfeld (DE) THENERT, Stefan 36266 Heringen (DE) WALDMANN, Ludger 48291 Telgte (DE) WIEBEL, Josef 34128 Kassel (DE) (74) Representative: Reitstötter Kinzebach  Patentanwälte Im Zollhof 1 67061 Ludwigshafen 67061 Ludwigshafen (DE)